The Joker posts a chilling video of himself with a hostage telling him (and his viewers) "how crazy Batman has made Gotham." He then laughs maniacally off camera, and the hostage's screaming is heard in the background. Later on, we see the hostage's now dead body hanging from a noose hit the window of a high rise building, with tense and scary music playing and also making a jumpscare. This is definitely the scariest moment in the film.